a moderate republican senator susan collins of maine voiced new concerns today about u.n. ambassador susan rice. it stemmed from rice's initial account, on a sunday talk show, of the attack on the u.s. consulate in benghazi, libya. at the time, she said it began as an anti-american protest, but she now says she was working off faulty intelligence. rice met with collins for 90 minutes today, but afterward the senator remained critical. >> i still have many questions that remain unanswered. i continue to be troubled by the fact that the u.n. ambassador decided to play what was essentially a political role at the height of the contentious presidential election campaign by agreeing to go on the sunday shows to present the administration's position. >> sreenivasan: collins stopped short of joining other republican senators who have said they will oppose rice if she is nominated to be secretary of state. later, president obama again defended rice. he called her extraordinary, and cabinet members joined him in applause. a pair of suicide car bombers in syria blew themselves up to